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SEGMENT DATA (Details) (USD $) In Thousands, unless otherwise specified | 3 Months Ended | 6 Months Ended |
--- | --- | --- | ---
Jun. 30, 2014 | Jun. 30, 2013 | Jun. 30, 2014 Segment | Jun. 30, 2013 | Dec. 31, 2013
SEGMENT DATA [Abstract] |  |  |  |  |
Number of Reportable Segments |  |  | 2 |  |
Revenues [Abstract] |  |  |  |  |
Marine transportation | $ 456,745 | $ 423,868 | $ 892,516 | $ 842,386 |
Diesel engine services | 171,309 | 140,040 | 324,784 | 280,307 |
Total revenues | 628,054 | 563,908 | 1,217,300 | 1,122,693 |
Segment profit (loss) | 121,679 | 102,134 | 222,679 | 194,070 |
Total assets | 3,867,880 |  | 3,867,880 |  | 3,682,517
Other segment disclosures [Abstract] |  |  |  |  |
General corporate expenses |  |  | (7,327) | (7,174) |
Gain (loss) on disposition of assets | 527 | 537 | 578 | 505 |
Interest expense | (5,469) | (7,219) | (11,087) | (15,207) |
Other income (expense) | 123 | 101 | (113) | 176 |
Profit (loss) from other segment |  |  | (17,949) | (21,700) |
Details of "Other" total assets [Abstract] |  |  |  |  |
Total assets | 3,867,880 |  | 3,867,880 |  | 3,682,517
Marine transportation [Member] |  |  |  |  |
Revenues [Abstract] |  |  |  |  |
Segment profit (loss) | 115,968 | 97,563 | 213,519 | 186,816 |
Total assets | 3,205,275 |  | 3,205,275 |  | 3,046,692
Details of "Other" total assets [Abstract] |  |  |  |  |
Total assets | 3,205,275 |  | 3,205,275 |  | 3,046,692
Diesel engine services [Member] |  |  |  |  |
Revenues [Abstract] |  |  |  |  |
Segment profit (loss) | 14,337 | 14,932 | 27,109 | 28,954 |
Total assets | 604,730 |  | 604,730 |  | 576,472
Details of "Other" total assets [Abstract] |  |  |  |  |
Total assets | 604,730 |  | 604,730 |  | 576,472
Other [Member] |  |  |  |  |
Revenues [Abstract] |  |  |  |  |
Segment profit (loss) | (8,626) | (10,361) | (17,949) | (21,700) |
Total assets | 57,875 |  | 57,875 |  | 59,353
Other segment disclosures [Abstract] |  |  |  |  |
General corporate expenses | (3,807) | (3,780) |  |  |
Gain (loss) on disposition of assets | 527 | 537 |  |  |
Interest expense | (5,469) | (7,219) |  |  |
Other income (expense) | 123 | 101 |  |  |
Profit (loss) from other segment | (8,626) | (10,361) |  |  |
Details of "Other" total assets [Abstract] |  |  |  |  |
General corporate assets | 55,537 |  | 55,537 |  | 57,197
Investment in affiliates | 2,338 |  | 2,338 |  | 2,156
Total assets | $ 57,875 |  | $ 57,875 |  | $ 59,353

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- Definition Overhaul and repair of medium-speed and high-speed diesel engines, reduction gear repair, and sale of related parts and accessories for customers in the marine, power generation and railroad industries. + References No definition available. + Details
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